This tab of IDA Options dialog allows for editing of hint and identifier highlight related settings. There are two groups of settings.

The first group is for hints that are displayed when the mouse is hovered over some text.

The second group is for highlighting.

Number of lines for identifier hints

Delay for identifier hints

Mouse wheel resizes hint window

No hints if debugger is active

Auto highlight the current identifier

Unhide collapsed items automatically when jumping to them (gui only)

Lazy jumps (gui only)

Number of items in navigation stack drop-down menus

Number of lines for auto scroll

Caret blinking interval